class_docstr: Parent State class which can contain up to 3 instances of PhaseState, for the 3 phases.
  Modified by the framework, read-only for the user.
docstr: Current active phase of the loop. (One of TRAIN, EVALUATE, PREDICT).
docstr_tok: ["Current","active","phase","of","the","loop",".","(","One","of","TRAIN",",","EVALUATE",",","PREDICT",")","."]
code: def active_phase(self) -> ActivePhase:
      """Current active phase of the loop. (One of TRAIN, EVALUATE, PREDICT)."""
      return self._active_phase
  
imports: import logging
  from enum import auto, Enum
  from typing import Any, Iterable, Optional
  from torchtnt.utils.timer import BoundedTimer, TimerProtocol
label_desc: Use image node_id 3 for calling the State obj's underlying member method code with example usage: obj.active_phase() and returns: self